I went to the Budget Breakfast yesterday hosted by NAB at Crown, Melbourne. Whilst there weren't any BBQ stoppers the presentation/economic update given by NAB's Chief Economist, Alan Oster was useful. His main message is that NAB's economic modelling is much the same as Treasury's.
Here is NAB's webcast: watch Alan Oster present his summary
View webcast (link opens in new window - you'll need to enter your name)